Zobrazeno 1 - 10
of 2 760
pro vyhledávání: '"Fujisawa, Y."'
Autor:
Okuma, R., Yamagami, K., Fujisawa, Y., Hsu, C. H., Obata, Y., Tomoda, N., Dronova, M., Kuroda, K., Ishikawa, H., Kawaguchi, K., Aido, K., Kindo, K., Chan, Y. H., Lin, H., Ihara, Y., Kondo, T., Okada, Y.
Analogous to the charged electron-electron pair condensation in superconductors, an excitonic insulator (EI) represents Fermi surface instability due to spontaneous formation and condensation of charge-neutral electron-hole pair (exciton). Unlike in
Externí odkaz:
http://arxiv.org/abs/2405.16781
Autor:
Yamagami, K., Fujisawa, Y., Pardo-Almanza, M., Smith, B. R. M., Sumida, K., Takeda, Y., Okada, Y.
Fe$_5$GeTe$_2$ is a van der Waals (vdW)-coupled unconventional ferromagnetic metal with a high Curie temperature ($T_C$) exceeding 300 K. The formation of an anomalous ground state significantly below $T_C$ has received considerable attention, result
Externí odkaz:
http://arxiv.org/abs/2205.08045
Autor:
Fujisawa, Y., Pardo-Almanza, M., Hsu, C. H., Mohamed, A., Yamagami, K., Krishnadas, A., Chuang, F. C., Khoo, K. H., Zang, J., Soumyanarayanan, A., Okada, Y.
Magnetic semimetals have increasingly emerged as lucrative platforms hosting spin-based topological phenomena in real and momentum spaces. Of particular interest is the emergence of Berry curvature, whose geometric origin, accessibility from Hall tra
Externí odkaz:
http://arxiv.org/abs/2204.02518
Autor:
Yamagami, K., Fujisawa, Y., Driesen, B., Hsu, C. H., Kawaguchi, K., Tanaka, H., Kondo, T., Zhang, Y., Wadati, H., Araki, K., Takeda, T., Takeda, Y., Muro, T., Chuang, F. C., Niimi, Y., Kuroda, K., Kobayashi, M., Okada, Y.
Publikováno v:
Phys. Rev. B 103, 060403 (2021)
We investigate near-Fermi-energy (EF) element-specific electronic and spin states of ferromagnetic van der Waals (vdW) metal Fe5GeTe2. The soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) measurement provides spectroscopic evidence of
Externí odkaz:
http://arxiv.org/abs/2101.01324
Autor:
Fujisawa, Y., Pardo-Almanza, M., Garland, J., Yamagami, K., Zhu, X., Chen, X., Araki, K., Takeda, T., Kobayashi, M., Takeda, Y., Hsu, C. H., Chuang, F. C., Laskowski, R., Khoo, K. H., Soumyanarayanan, A., Okada, Y.
Publikováno v:
Phys. Rev. Materials 4, 114001 (2020)
Magnetic transition metal dichalcogenide (TMD) films have recently emerged as promising candidates to host novel magnetic phases relevant to next-generation spintronic devices. However, systematic control of the magnetization orientation, or anisotro
Externí odkaz:
http://arxiv.org/abs/2008.00381
Autor:
Okuma, R., Ueta, D., Kuniyoshi, S., Fujisawa, Y., Smith, B., Hsu, C. H., Inagaki, Y., Si, W., Kawae, T., Lin, H., Chuang, F. C., Masuda, T., Kobayashi, R., Okada, Y.
CeTe3 is a unique platform to investigate the itinerant magnetism in a van der Waals (vdW) coupled metal. Despite chemical pressure being a promising route to boost quantum fluctuation in this system, a systematic study on the chemical pressure effec
Externí odkaz:
http://arxiv.org/abs/2007.15193
We present scanning tunneling microscopy and spectroscopy measurements on a cleaved surface of the LaO0.9F0.1BiSe2 single crystals. Tunneling spectra show a finite local density of states at EF, which is consistent with metallic conductivity in bulk.
Externí odkaz:
http://arxiv.org/abs/1801.08735
We examined Lead (Pb) Substitution effect on a single crystal of a layered superconductor LaO0.5F0.5BiS2. Pb concentration dependence of the lattice constant showed slight anomaly at about 8% and 9% substitution of Pb for Bi. These samples showed the
Externí odkaz:
http://arxiv.org/abs/1711.02004
Autor:
Banerjee, D.1 (AUTHOR), Fujisawa, Y.2 (AUTHOR), Minamide, T. M.3 (AUTHOR) minamide@yamaguchi-u.ac.jp, Tanigawa, Y.4 (AUTHOR)
Publikováno v:
Acta Mathematica Hungarica. Aug2023, Vol. 170 Issue 2, p635-644. 10p.
Publikováno v:
Solid State Communications 223 (2015) 40-44
We succeed in enhancement of a superconducting transition temperature (Tc) for NdO0.7F0.3BiS2 single crystal by partial substitution of Pb for Bi. The Tc increases with increasing Pb concentration until 6%. The maximum Tczero is 5.6 K, which is the h
Externí odkaz:
http://arxiv.org/abs/1509.06486